SL990

hi, i recently re-installed RA2 and am having problems with online play... when i click on internet and then one of the next options (e.g. quick match) it says it starts trying to download an upgrade (which worked fine the first time i installed it) but now it just says "the download failed, please check your connection and try again later". i'm pretty sure i've disabled my firewalls and everything. any help would eb greatly appreciated